NO: E-29021|61720|2024|Electrical(HQ)                                                                                            Dhanbad, Date: 13.02.2024

                                                                                     DGMS APPROVAL NO.-733 of 2018

From

Director General of Mines Safety
Directorate General of Mines Safety,
P.O & Distt: Dhanbad - 826 016.

To

JOYDIP CHAKRABORTY, M/s- Electroteknica engineering pvt.lted., ELECTROTEKNICA ENGINEERING PVT.LTD. 1/5B, RAJA BASANTA ROY ROAD, KOLKATA700026
West Bengal, KOLKATA, KOLKATA, 700026

Subject: Approval  under Regulation 208 (3) of the Coal Mines Regulations, 2017 for 3.3 KV/1100V-550V flameproof Transwitch unit, rated upto 750 KVA, Type- FTSU-2 as per list mentioned in Annexure-B of original approval  letter manufactured by M/s. Electroteknica Engineering Pvt. Ltd, Kolkata conforming to IS/IEC 60079-0:2017 and IS/IEC 60079-1:2014 for use in belowground Coal Mines– Renewal thereof.

Sir,

Please refer to your online application No. E-29021/61720/2023/Electrical (HQ), dated 16.11.2023 on the above subject, test reports and other documents submitted therewith in this regard. 

I, in exercise of powers conferred upon Chief Inspector of Mines (also designated as Director General of Mines Safety) under Regulation 208(3) of the Coal Mines Regulations, 2017, hereby renew the approval ( Approval No. 733 of 2018) granted vide this Directorate's letter No. 446/609/EHQ dated 09.07.2018 for a further period of two years, i.e. up to 13.02.2026  for use in belowground Coal Mines.  The conditions mentioned in the original approval and subsequent renewal letters shall be strictly complied with. 

Please note that application for renewal should be made at least three (03) months before the date of expiry of the approval.

Yours faithfully,